php - is there a way to know if the link to a file is force downloaded? -
The title completely explains my question: Do I have a link to the PDF file, can I know that this force The download link is using php, c ++, linux wget command etc. (anything I can use on the server) (no Java)
HTTP
, it is impossible to fully understand whether using the method to download the file Interpretation is unless the requester not voluntarily recognize a user-agent string or manually through a few things.
If you use the web-server language, then you can protect the file behind an authentication mechanism.
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